diff --git a/pyproject.toml b/pyproject.toml
index 8b2ef6e6d..d0294fbdf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ license = {text = "Apache-2.0"}
 requires-python = ">=3.13"
 dependencies = [
     "anthropic>=0.72.0",
-    "claude-agent-sdk~=0.1.43",
+    "claude-agent-sdk>=0.1.43,<0.3.0",
     "openai>=2.7.1",
     "openai-agents>=0.5.0",
     # Official OpenAI Codex SDK — drives CodexSDKv2 (the v2 agent-loop